The amount of bonus XP granted is equal to 1/3 the amount of experience required to reach the character's next level. This bonus is only consumed as you acquire experience similar to the bonus for Reputation Experience Small Reputation Acceleration Tome or Reputation Acceleration Tome and therefore persists across login sessions, i.e. it is not timed.

Changes in Update 11

Enhanced Experience

There will be two kinds of Enhanced XP: VIP Bonus XP and Store item Bonus XP.

VIP Bonus will appear blue on your experience bar. Store Bonus will appear as light blue. Bonus experience will apply to all basic forms of experience (adventure XP, legendary, steed, etc.). If both the VIP bonus and the Store bonus are present, the VIP bonus will be used first. Store Experience boosters, like the Tome of Extraordinary Experience, can be used along with these bonuses.